Vulnerability · Published Sep 18, 2026 · Assigned by mitre
CVE-2026-93852
High 7.1
In plain English
A high-severity missing authorization in Blazar from OpenStack. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
In OpenStack Blazar before 17.0.1, the V2 lease listing operation (GET /v2/leases) returns leases for every project without enforcing project scoping or an administrator-only policy. Any authenticated user with access to the Blazar REST API can enumerate leases belonging to other tenants, exposing lease IDs, reservation IDs, resource IDs, and reservation metadata. The exposed lease IDs also enable the object-level authorization bypass tracked in the companion request, allowing an attacker to then modify or delete the enumerated leases.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | blazar | no fix listed | DEBIAN-CVE-2026-93852 |
| Debian:14 | blazar | 18.0.0~rc1-3 | DEBIAN-CVE-2026-93852 |
| Ubuntu:26.04:LTS | blazar | no fix listed | UBUNTU-CVE-2026-93852 |
| Ubuntu:26.10 | blazar | no fix listed | UBUNTU-CVE-2026-93852 |
Affected products (as reported)
Weakness: CWE-862 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://launchpad.net/bugs/2162719 issue-tracking